<script setup>
// 引入ref
import {ref,onMounted} from "vue"
// 引入二级分类列表数据接口
import {getCategoryFilterAPI} from "@/apis/category.js"
// 引入接口用于基础列表数据渲染
import {getSubCategoryAPI} from "@/apis/category.js"
// 引入useRoute用于获取参数
import { useRoute } from "vue-router";
// 引入GoodsItem组件用于商品渲染
import GoodsItem from "@/views/Home/components/GoodsItem.vue";

// 调用useRoute获取route实例对象
const route = useRoute()
// 声明响应式对象数据
const categoryData = ref({})
// 定义方法获取面包屑导航数据
const getCategoryData = async ()=>{
    const res = await getCategoryFilterAPI(route.params.id)
    categoryData.value = res.result
}

// 获取基础列表数据渲染
const goodList = ref([])
// 准备用于基础列表数据渲染所需的参数对象
const reqData = ref({
    categoryId:route.params.id,
    page:1,
    pageSize:20,
    sortField:'publishTime'
})
const getGoodList = async ()=>{
    const res = await getSubCategoryAPI(reqData.value)
    goodList.value = res.result.items;
    console.log(goodList.value);
}

// 定义tab发生变化时回调
const tabChange = ()=>{
    console.log("tab发生改变",reqData.value.sortField);
    // 将页面页数重置为一
    reqData.value.page = 1
    getGoodList();
}

// 声明disabled用于停止加载
const disabled = ref(false)

// 实现列表无限加载方法
const load = async ()=>{
  console.log("加载更多");
    reqData.value.page++
    // 重新网络请求获取新数据
    const res =await  getSubCategoryAPI(reqData.value);
    // 新老数据拼接并赋值给响应式数据
    goodList.value=[...goodList.value,...res.result.items]
    // 加载完毕停止监听
    if(res.result.items.length===0){
        // 停止监听
        disabled.value = true;
        console.log("停止监听");
    }
}

// 调用方法
onMounted(()=>{
    getCategoryData();
    getGoodList()
})
</script>

<template>
  <div class="container ">
    <!-- 面包屑 -->
    <div class="bread-container">
      <el-breadcrumb separator=">">
        <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item :to="{ path: `/category/${categoryData.parentId}` }">{{categoryData.parentName}}
        </el-breadcrumb-item>
        <el-breadcrumb-item>{{categoryData.name}}</el-breadcrumb-item>
      </el-breadcrumb>
    </div>
    <div class="sub-container">
      <el-tabs v-model="reqData.sortField" @tab-change="tabChange">
        <!-- 筛选框 -->
        <el-tab-pane label="最新商品" name="publishTime"></el-tab-pane>
        <el-tab-pane label="最高人气" name="orderNum"></el-tab-pane>
        <el-tab-pane label="评论最多" name="evaluateNum"></el-tab-pane>
      </el-tabs>
      <!-- 列表无限加载 -->
      <div class="body" v-infinite-scroll="load" :infinite-scroll-disabled="disabled">
         <!-- 商品列表-->
          <GoodsItem v-for="goods in goodList" :goods="goods" :key="goods.id" />
      </div>
    </div>
  </div>

</template>



<style lang="scss" scoped>
.bread-container {
  padding: 25px 0;
  color: #666;
}

.sub-container {
  padding: 20px 10px;
  background-color: #fff;

  .body {
    display: flex;
    flex-wrap: wrap;
    padding: 0 10px;
  }

  .goods-item {
    display: block;
    width: 220px;
    margin-right: 20px;
    padding: 20px 30px;
    text-align: center;

    img {
      width: 160px;
      height: 160px;
    }

    p {
      padding-top: 10px;
    }

    .name {
      font-size: 16px;
    }

    .desc {
      color: #999;
      height: 29px;
    }

    .price {
      color: $priceColor;
      font-size: 20px;
    }
  }

  .pagination-container {
    margin-top: 20px;
    display: flex;
    justify-content: center;
  }


}
</style>